Abstract: Textiles, preferably yarns and fibers, based on synthetic polymers, with permanent conducting properties, which possess, on the surface, a uniform continuous layer consisting of at least 3% of copper sulphide, the composition of which is such that the atomic ratio Cu/S is between 1.5 and 2, and preferably more than 1.7, and of which the ratio R/R.sub.o is between 1 and 10, R being the electrical resistance after treatment for 400 hours at 60.degree. C. and at a humidity of 70%, and R.sub.o being the initial resistance of the treated textile. The synthetic polymer is based on polyamide or polyester, or is an aromatic polyamide or a polyamide-imide. Processes for the manufacture of these textiles and textile articles with permanent conducting properties, such as floor/wall coverings, containing between 0.01 and 5% of the treated textiles, are also disclosed.

Abstract: A moldable polyester-amide is disclosed characterized in that it is derived from:An aromatic organic diacid (1) whose carboxyl groups are directly attached to an aromatic ring in the para-position;A primary diol (2) of the general formula HO--CH.sub.2 --R--CH.sub.2 --OH in which R represents either a straight aliphatic chain comprising at least 4 carbon atoms, or an aliphatic chain branched by alkyl or aryl groups, or an aromatic ring; andA salt of an organic diacid (3) and a primary diamine of aliphatic character (4);And being further characterized in that it possesses a degree of whiteness equal to or greater than 80% and a luminosity equal to at least 35%, as defined in standard specification ASTM-E 308-66, a number of --NH.sub.2 end groups equal to or greater than 30 per ton of polymer, preferably greater than 40.A shaped article (e.g., a yarn, a film, or a fiber) derived from the aforesaid polyester-amide is also disclosed.